// 云函数入口文件
const cloud = require('wx-server-sdk')

cloud.init()

// 云函数入口函数
exports.main = async(event, context) => {
  const wxContext = cloud.getWXContext()

  // return {
  //   event,
  //   openid: wxContext.OPENID,
  //   appid: wxContext.APPID,
  //   unionid: wxContext.UNIONID,
  // }

  const db = cloud.database()
  return await db.collection('cart').aggregate().match({
    _openid: event.openid
  })
    .lookup({
      from: 'goods',
      localField: 'goodsId',
      foreignField: '_id',
      as: 'cartList',
    })
    .end();

  //return await db.collection('cart').get();

}